Plug connector



MamHZS, 1941 I SCHNEIDER 22363 85 PLUG comuzcwon Filed July 22, 1939 INVENTOR W ATTORNEY I Patented Mar. 25, 1941 UNITED STATES PATENT OFFICE PLUG comocroa Martin Schneider, New York, N. Y. Application July 22, 1939, Serial No. 285,835

1 Claim. (Ch173-361) This invention relates to.new and useful improvements in a plug connector.

The invention has for an object the construction of a plug connector which .is characterized by a tubular body, and a core threadedly engaged therein, and these parts being arranged in a certain way so that conductor wires .used in the plug connector may be clamped between the tubular body and the core. The advantage of this construction resides in the fact that pulls and other strains transmitted by the conductor wires will be taken up by the tubular body and core and so be restrained from being transmitted to the usual screws used in securing the conductor wires in place in the plug connector.

Still further the invention contemplates the construction of a tubular body in a certain way so that it may or may not have a projecting rear portion which may be used as a handle.

Still further the invention proposes-the provision of a novel means for fixedly holding the core in position in the tubular body, to prevent these parts from becoming accidentally loosened.

Another object of this invention resides in the construction of-a plug connector as mentioned which is simple and durable and which may be manufactured and sold at a reasonable cost..

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the following description and accompanying drawing, and to the appended claim in which the various novel features of the invention are more particularly set forth.

In the accompanying drawing forming a ma-' terial part of this disclosure:

Fig. 1 is a perspective'view of a plu'g'connector constructed inaccordance with this invention Fig. 2 is a .vertical section'al view of the plug connector shown in Fig. 1. v

Fig. 3 is a sectional view of the tubular'body,

Fig. 4 is a sectional view of the core, per se. Fig. 5 is a side elevational view of one of the contact strips used in the plug connector.

Fig. 6 is a side elevational view of another one of the contact strips used in the plug connector.

Fig. 7 is a bottom view of Fig. 4 looking in the direction of the line 1-! thereof.

Fig. 8 is a perspective view of a plug connector constructed in accordance to another embodiment of this invention,

Fig. 9 is a vertical sectional view of the plugconnector illustrated in Fig. 8.

The plug connector in accordance with this threads formed upon the inside wall of the tuceiving openings l3 and bular body to. At its front end the core II has a disc shaped portion li At its rear end the core II has a dome shaped portion II. The 10 core I I is also formed with several longitudinally extending grooves l2 formed in its sides and extending from the rear end H to a short distance from the front end of the core. More specifically the grooves l2 terminate at the rear of 15. the disc portion ll A pair of contact strips l3, ll have their inner ends I3 and I4 respectively mounted in the grooves l2 and have their front ends l3 and ll respectively projecting from apertures l5 formed 20 in the font end of the-core ll. These contact strips have offset inner end portions HF and 14 respectively, engaging. into complementary rel4 formed in the base of thegrooves l2. Conductor wires l6 extend into the restricted open rear end-I0 of the tubular body It) and have their inner extremities I Gconnected with the contact strips. l3 and I4. More specifically the conductor wires I6 have insulation portions 30 removed from their front" ends hand it is these exposed end portions which are attached to the conductor strips 13 and, I4.

Small head screws I! are threadedly mounted through the conductor strips and I each are 35 threadedly" extended into openings l8 formed in the base of the grooves II. The end portions l6 of the conductor wires l6 are turned around beneath the heads of the screws l1. Certain areas portions of the conductor wires It. This flar'ed. 50 portion may be used as a handle byv which the conductor plug may be conveniently gripped and manipulated. The tubular body I is also provided with a knurled circumferential area Ill to facilitate gripping thereof.

In Figs. 8 and 9, a modified form of the invention has been disclosed which distinguishes from the prior form in the construction of the tubular body. According to this form of the invention there is a tubular body I0 which is substantially identical to the tubular body I0 distinguishing merely in the fact that it is devoid of the flared rear end portion In In this form of the invention the conductor wires i6 come out. from the open rear end Iii of the tubular body.

Moreover a leaf spring 20 is mounted upon the side wall of the tubular body in' and has an intermediate portion 20*- extending through an opening 20 formed in the side wall of the tubular body I 9'. This intermediate portion 28" is roughened and engages against a roughened serrated areaat formed around the core ii.

- The leaf spring 2|] has an offset outer end 20 understood that I do notdimit myself to the precise constructions herein disclosed and the right is reserved to all changes and modifications coming within the scope of the invention as defined in the appended claim.

Having thus described my invention, what I claim as new, and desire to secure by United States Letters Patent is:

In a plug connector, a tubular body having an open front and a restricted open rear end, a core threadedly engaged into said body through said open front end, contact strips mounted on said core and extended beyond the front end thereof. conductor wires attached to said contact strips and projected through said restricted open rear end, and means on said body engageable with said core for preventing said core from becoming accidentally disengaged from said body. comprising a leaf spring having one end securely attached to the outside face of said body, serrations formed at points around the circumference of said core, said spring having its central por-- tion projected through an opening formed in said body and engageable with said serrations,

said spring having its free end bent away from the adjacent face of said body so that ones nail may be engaged therebeneath to flex said spring to disengage its central portion from said serrations.

MARTIN SCHNEIDER. 

